Guys this would be good to read, we're going to be using sandbags- excuse me, tourniquet bags (we'll call them TK bags for short, haha) a LOT this coming cycle.
They're really cheap to make. My duffle that I got, I found by googling and then clicking the shopping tab. Cost me $5. $8 for 80 lbs of wood pellets, and nothing for the paracord and steel bolt that I already had. Very useful, and very cheap. Recession-proof fitness.